Handle for pneumatic drills.



A. LEVEDAHL,

HANDLE FOR PNEUMATIC DRILLS.

APPLICATION FILED DE(J.13, 1909.

Patented Oct. 11, 1910.

jivenfor WW m dtzzw hzmdha end, indicated ANY, (1F A'URGLR-A,

AURORA, ILLINOIS Speci "motion of Letters Patent.

ASSIGNQR AURORA AU'L'QMATIC MA- ILLINGIS, .53. CORPGRATIQN OF ILLINOIS.

ITS-LE FOR PJBIEEl'IVL-NZIG HEEL-LS.

Patented @ct. 313i, 191d.

Application filed December 13, 1909. Serial No. 532,753

To all whom it may concern:

Be it known that if, A) :L I ""EDAIULW a citizen of the United Statv and a resident of Aurora, in. the count of and State of Illinois, here invented certain new and useful Improve:nents in l'i'zindles for Pneumntic Drills; and I. do hereby declare that the jl ollowing s 2i iull, lear, and exact description thereof, rein i re heingg' .lnid to the accompanying d1: will; and to the letters of reference inn; u t ,i room which form a purl; of this speclncntum.

This invention rchilcs to an inmrovcment in reciprocating drills and particularly to an improved. hnnifllc and means for attach in; the some to the body or the drills The object or". the invention is to reduce the shock due to the action of the tool to n minimum.

As illustrated in the drnwi s, my illiproved handle is shown n connection with n \flalveless pucunnatic d." hut ii will he apparent that it may he applied in any type of l.'ecij. rocuting drill.

in the drawings:- *F

gure l is 11 side clevution. of a pneumatic d ill provided with my improveinci'it showing the handle and the upper end of the drill body in sectiml. Fig. 2 is a transverse section through F 1 on the line 2-4? thereof. Fig. is n cro a lie on the line 3--3 section through the ham thereof.

A llltlltfztlQS the hoilv or barrel oi the dr ill and B the handle. gr pping member 3 {and attaching; inc necrs B, E formed in "ith the oping member at" each end there-u The attaching members B are nrovidcd Willi projecting' shanks (l, C which are pro l crshly c vlin dric in form. t mid sin: l s are mint-lied to the body A oi the drill v menus of hugs or ears D which are former: on opposii'esidcs of said body it the end i' ereol Said cars are counicrlmred f" ei her end as ind carted C .3 to i ve :1. shoulder (Z wl bored to looselvfit l shank C is mnde o l handle Kl'OmjH'lSPS c to . in o. shoulder oi The no 0 s loosely within the counterhore C. he counter-hero C fits a collar (5* which ioose engage: the smaller diameter of the shank and i mined in place by not i? secured to the end of the shank which is screw-threaded for the purpose as indicated o, fit '11 the counterhores are located cushion members or, g which are made of cork or other cushioning material, the cushioning meniher G engaging between the shoulder 1 on the shank and shoulder (Z separating the counter-bores of the ear and the cushioning member engaging between said latter mentioned shoulder and the collar d it will. he noted that by the construction described. the Sl1u(l( due to the upward thrust of the reciprocating member of the tool is taken up by the cushion member G: while the shock due to the downward thrustof said reciprocating member is taken up by the cushion member 9, the two together thus relieving the vibratory result of said shocks in the handle. To still further ease the action on the hand of the operator, I prefer to provide the gripping member B with a eusnioi'iing envelop and to this end I form the gripping member of :1 metal Web Z of cross-shaped section and cast or otherwise form about this Web n cushioning enve op nmde of soft i'nhric, rubber 01' other suitulj-lc ninicrial.

To loci: the nut F in place and thereby prevent it from becoming loose under the notion the d ill a pin is passed through {L hole f in the nut and through correspond.- ing hole through thescrewthrendcd part of the shank c; Several. holes 7 are provided in the nut to provide "for its proper adjustment with reference to the collar at". Any other convenient means for locking suid nut in place may n iopted.

"vi'hilc I lnive shown and (lescrihed herein ccri'niu details of mechanical construction, it is to be nude-"stood that they may he modilied in various Iwuys Without departing); from the spirit oi my invention and that l do not limit myself to them except as pointed out in the appended claims.

claim as my invention z 1. in comhumtion ith a drill body, laterilly e incline" ears tlorn'icd at the rear end of said body, each of suid ears being counter bored longitudinally from its opposite ends, an n JQltilllQCl ring formed rigidly with said ears separating said counterbores, a handle for said drill body provided with longitudinally extending shanks with screwthrend d ends, one for each of said ears, each shank living a flange engaging Within the counteri'iore an; rear endoi said ear, and

lit within said apertured ring, a cushioning nieanber located between said apertured ring and the flange on said shank, an apertured collar surrounding the forward end of said shank and fitting within the forward end of said ear, a cushioning ineinber located between said apertured ring and said apertured collar, and a lock nut screwed upon the threaded end of said shank and engaging the lower face of vsaid apertured collar.

In a reciprocating drill, in combination with the barrel, laterally extending ears formed at the end of said barrel, each ear being provided with an opening therethrough, an internally extending shoulder within said ear, a handle provided with pro- 2 je ting shanks, each of said shanks engaging within one of said ears on the barrel, an an nnlar shoulder formed on each shank above the said shonloer within said ear, a collar snrrrmnding the shank below said shoulder 1 )QCil'VLl" between said shoulders and be "tween one of said honlda'zrs and said collar,

and means for locking said parts in position. 3. in combination with a drill body, ears formed on said body, said ears being counwithin the ear, cushioning members bearing j provided with projecting shanks, one for each of said ears, said shanks being provided with Sl10lll(l8lS, and fi ting within said ears, cushioning 'lnQIFbCiS surrounding said shanks and a anged one between the shoul der on the shank and the shoulder in the ear, and a second cushioning member arranged below the shoulder in the ear, acollar on the shank in engagement with said last named cushioning member, and means for locking the parts in position.

In combination with a drill body, ears formed on said body, said ears being counterbored from their opposite ends, shoulders separating said counterbore-s, a handle pro- "vided with pro ecting shanks, one shank engaging within each of said ears, fixed members located on said shanks above and below the shoulders in said rs, and on hioni nieinbers surroiniding said shanks and en gaging between said shoulders in i ears and said nieinbers lixed on said shann In testimony, that I claim the foregoing as my invention 1 atiix my signature in the presence of two witnesses.

AX E l) LEVER/ill i L. 

